Senior Systems Engineer

About us

Great technology. Reliable infrastructure. Happy clients. That’s what drives us at Comunet. We’re a leading provider of innovative IT solutions and services, specialising in networks and systems administration. We deliver secure, scalable infrastructure that helps businesses thrive in a digital world. Our team brings a passion for technology excellence and customer success to a collaborative, forward-thinking workplace—where solving problems together is part of the appeal.

About the role

Enjoy untangling a tricky infrastructure problem and building a solution that lasts? We’d love to meet you. We’re looking for a Senior Systems Engineer with at least five years’ hands-on IT infrastructure experience and practical cloud experience to join Comunet in Adelaide, SA. In this full-time role, you’ll design, implement and maintain critical infrastructure for a diverse range of clients, keeping their systems and networks stable, secure and performing well. You’ll work alongside our technical teams and clients to turn evolving business needs into reliable, secure and scalable solutions—and help bring their digital transformation plans to life.

Key responsibilities

• Take technical ownership of designing and implementing robust network, systems and cloud infrastructure solutions, translating client requirements into designs that align with industry best practices.

• Install, configure and maintain servers, operating systems, applications and network equipment

• Monitor system performance, diagnose issues and troubleshoot technical problems to ensure optimal uptime and reliability

• Conduct regular system maintenance, updates and patches whilst minimising disruption to business operations

• Implement and manage security protocols, backup solutions and disaster recovery procedures

• Document system configurations, processes and procedures to support knowledge management and business continuity

• Collaborate with other teams to plan and execute infrastructure upgrades and migrations

• Act as a technical escalation point for complex infrastructure issues and provide guidance to colleagues and end-users. Coach and mentor other engineers, including junior team members, and the service desk team—sharing knowledge, building troubleshooting skills and helping others grow their confidence in infrastructure best practices.

• Liaise with clients to understand their technical requirements and provide recommendations for system improvements

• Participate in Comunet’s on-call roster to provide after-hours support for client infrastructure issues.

What we're looking for

• At least five years’ hands-on experience as a Systems Engineer or in a similar infrastructure and systems administration role, including designing, implementing and supporting networks and systems infrastructure.

• Strong technical knowledge of operating systems, including Windows Server, Linux (Desirable) and cloud platforms (Azure, AWS)

• Hands-on experience with network administration, configuration and troubleshooting (TCP/IP, DNS, DHCP, firewalls)

• Proficiency with virtualisation technologies such as VMware or Hyper-V

• Experience with backup and disaster recovery solutions

• Knowledge of security protocols, compliance frameworks and system hardening techniques

• Excellent problem-solving skills with the ability to analyse complex technical issues and implement effective solutions

• Strong communication and interpersonal skills with the ability to work effectively in a team environment

• Relevant infrastructure or cloud qualifications or certifications, supported by demonstrated hands-on experience. Examples include Microsoft Certified Associate or equivalent credentials; CompTIA A+ and Network+ are also relevant, but do not replace the required practical experience.

• Ability to manage multiple priorities and record work in timesheets

• Hands-on experience deploying, administering and troubleshooting cloud infrastructure in Azure or AWS; experience with infrastructure-as-code practices would be advantageous.

What we offer

Your next technical challenge shouldn’t come at the expense of your wellbeing. At Comunet, we support your professional growth with competitive remuneration, ongoing development opportunities and industry certifications. You’ll be part of a workplace that encourages innovation, collaboration and continuous learning—so your curiosity can get a workout too. We offer flexible working arrangements where possible to support work-life balance, alongside comprehensive health and wellness benefits. Above all, you’ll find a supportive culture where your contributions are valued and recognised. We’re an equal opportunities employer and welcome applications from candidates of all backgrounds.

Apply now

Ready to put your infrastructure and cloud skills to work on your next challenge? If you’re a Senior Systems Engineer who cares about delivering high-quality solutions, we’d love to hear from you. Send us your CV and any relevant certifications, together with a required cover letter, and take the next step towards joining the Comunet team in Adelaide.